▎ 摘　　要

Two materials have been derived from a composite of humic acid and graphene oxide (HA-GO). First material was obtained by high-temperature carbonization of the HA-GO composite in an inert atmosphere, and second material was produced by reduction of the HA-GO composite with hydrazine hydrate. The results of comparative studies of the materials using IR, Raman and XPS spectroscopies are presented. In IR spectra, no absorption due to stretching of vibrations O H is observed for both the materials. The XPS spectra of humic acids and its composite show sufficiently high content of carbon atoms, which are bonded with oxygen atoms, the Cls peak in the XPS spectra of both the materials under study show asymmetry inherent of graphite material, which confirms the outcomes of IR and Raman studies. This could be attributed to high conductivity of the materials. It has also been established that specific surface area SBET is equal to 36.2 and 6.5 m(2)/g for thermally treated composite and chemically treated composites materials, respectively. However, the values of specific surface area SKI; measured by the method of standard contact porosimetry with octane as a working liquid, is equal to 470 m(2)/g and 200 m(2)/g in the case of thermally treated composite and chemically treated composites materials, respectively. (C) 2017 Elsevier Inc. All rights reserved.